<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8" name="referrer" content="no-referrer">
    <title>Title</title>
    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@4.5.0/dist/css/bootstrap.min.css"
          integrity="sha384-9aIt2nRpC12Uk9gS9baDl411NQApFmC26EwAOH8WgZl5MYYxFfc+NcPb1dKGj7Sk" crossorigin="anonymous">
    <script src="https://cdn.jsdelivr.net/npm/jquery@3.5.1/dist/jquery.slim.min.js"
            integrity="sha384-DfXdz2htPH0lsSSs5nCTpuj/zy4C+OGpamoFVy38MVBnE+IbbVYUew+OrCXaRkfj"
            crossorigin="anonymous"></script>
    <script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js"
            integrity="sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo"
            crossorigin="anonymous"></script>
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@4.5.0/dist/js/bootstrap.min.js"
            integrity="sha384-OgVRvuATP1z7JjHLkuOU7Xw704+h835Lr+6QL9UvYjZE3Ipu6Tp75j7Bh/kR0JKI"
            crossorigin="anonymous"></script>
</head>
<body>
{% block head %}
    <div class="container">
        {% set msgs = get_flashed_messages() %}
        {% for msg in msgs %}
            <div class="alert alert-danger" role="alert">
                {{ msg }}
                <button type="button" class="close" data-dismiss="alert" aria-label="Close">
                    <span aria-hidden="true">&times;</span>
                </button>
            </div>
        {% endfor %}
    </div>

    <div class="container">
        <div class="input-group mb-3">
            <input type="text" class="form-control" placeholder="输入书名，ISBN" aria-label="Recipient's username"
                   aria-describedby="basic-addon2">
            <div class="input-group-append">
                <span class="input-group-text" id="basic-addon2">搜索书籍</span>
            </div>
        </div>
    </div>
{% endblock %}
{% block content %}
{% endblock %}
{% block foot %}
{% endblock %}
</body>
</html>